EP 4215358 A1 20230726 - COLOR-CHANGING SHEET
Title (en)
COLOR-CHANGING SHEET
Title (de)
FARBWECHSELBLATT
Title (fr)
FEUILLE À CHANGEMENT DE COULEUR
Publication
Application
Priority
- KR 20200118249 A 20200915
- KR 2021011166 W 20210823
Abstract (en)
A color-changing sheet according to an embodiment of the present invention may include a base layer having a brightness (L value) of less than 40 and a color layer positioned on at least one surface of the base layer, containing a color dye or a pigment, and having a transmittance of 20 to 90%, wherein a thickness ratio of the base layer to the color layer is 0.1 to 10, and may realize color change without adding additional particles.
IPC 8 full level
B32B 7/023 (2019.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01)
CPC (source: EP KR US)
B32B 7/023 (2019.01 - EP KR US); B32B 27/08 (2013.01 - EP US); B32B 27/20 (2013.01 - EP KR US); B32B 27/32 (2013.01 - EP KR); B32B 27/36 (2013.01 - EP KR US); B32B 27/365 (2013.01 - EP KR); C08L 67/00 (2013.01 - US); B32B 2250/24 (2013.01 - EP); B32B 2255/10 (2013.01 - EP US); B32B 2255/26 (2013.01 - US); B32B 2307/4026 (2013.01 - EP US); B32B 2307/408 (2013.01 - EP); B32B 2307/414 (2013.01 - EP US); B32B 2307/7376 (2023.05 - EP US); B32B 2451/00 (2013.01 - US); C08L 2203/16 (2013.01 - US); C08L 2205/02 (2013.01 - US); C08L 2310/00 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4215358 A1 20230726; EP 4215358 A4 20241009; KR 102403086 B1 20220526; KR 20220036088 A 20220322; US 2023321949 A1 20231012; WO 2022059943 A1 20220324
DOCDB simple family (application)
EP 21869566 A 20210823; KR 20200118249 A 20200915; KR 2021011166 W 20210823; US 202118024181 A 20210823